Each BrainBox from The Green Board Game Co is a fast and fun game that does not require any pens; pencils; paper; playing board or even a table. Each round takes 10 seconds so all players are involved. A game lasts as long as you want it to; 10 minutes is the norm; but playing for 5 minutes is great fun also. Perfect for families and groups of friends to play; wherever they are; on a level playing field. Packed in a sturdy cool magnetic cube box.